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AU2006222318B2 - Device for measuring the gas content in a metal melt - Google Patents
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AU2006222318B2 - Device for measuring the gas content in a metal melt - Google Patents

Device for measuring the gas content in a metal melt Download PDF

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Publication number
AU2006222318B2
AU2006222318B2 AU2006222318A AU2006222318A AU2006222318B2 AU 2006222318 B2 AU2006222318 B2 AU 2006222318B2 AU 2006222318 A AU2006222318 A AU 2006222318A AU 2006222318 A AU2006222318 A AU 2006222318A AU 2006222318 B2 AU2006222318 B2 AU 2006222318B2
Authority
AU
Australia
Prior art keywords
gas
collecting body
molten
content
molten metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
AU2006222318A
Other versions
AU2006222318A1 (en
Inventor
Erik Gerits
Jacques Plessers
Jos Swennen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heraeus Electro Nite International NV
Original Assignee
Heraeus Electro Nite International NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heraeus Electro Nite International NV filed Critical Heraeus Electro Nite International NV
Publication of AU2006222318A1 publication Critical patent/AU2006222318A1/en
Application granted granted Critical
Publication of AU2006222318B2 publication Critical patent/AU2006222318B2/en
Anticipated expiration legal-status Critical
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/20—Metals
    • G01N33/205—Metals in liquid state, e.g. molten metals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/20—Metals
    • G01N33/202—Constituents thereof
    • G01N33/2022—Non-metallic constituents
    • G01N33/2025—Gaseous constituents
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
    • G01N33/0037—NOx
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
    • G01N33/004—CO or CO2
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
    • G01N33/005—H2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Investigating And Analyzing Materials By Characteristic Methods (AREA)
  • Sampling And Sample Adjustment (AREA)

Description

Device for Measuring the Gas Content in a Molten Metal The invention relates to a device for measuring the gas content in a molten metal, comprising an immersion end having a gas-collecting body, a gas supply line opening to the immersion end, and a gas discharge line for the gases passing through the gas-collecting body, and also relates to its use. Such devices are known from EP 307 430 B 1. The devices described here are suitable for measuring the gas content, particularly hydrogen, for example in molten steel. Here, the gas collecting body is made of porous stone. With different melts it can happen that the measurement is impaired, in that the openings of the body become blocked or the surface of the body does not make sufficient contact with the molten metal. A similar device is also known from US 6,216,526 B 1. This device has a quartz-glass tube, in which the melt is collected. The molten metal can then penetrate into the interior of the immersion probe through a stopper, which is permeable for the melt. This stopper made of aluminum oxide should hold back impurities in the molten metal. From DE 38 74 423 T2 (EP 295 798 B1) a probe is known for determining the concentration of a gas in molten metal, the probe comprising a gas-collecting body, wherein the gas-collecting body has a gas supply line and a gas discharge line for the gases passing through the gas-collecting body. The gas-collecting body is made of aluminum oxide. From DT 24 23 783 A 1, an 2 immersion sensor is known for measuring oxygen in molten metals with a solid electrolyte spinel structure. The invention is based on the problem of improving the present devices and, in particular, preventing a blockage of the gas-collecting body. 5 According to an aspect of the invention there is provided a device for measuring the gas content in a molten metal, comprising an immersion end having a gas-collecting body, a gas supply line opening at the immersion end, and a gas discharge line for the gases passing through the gas-collecting body, wherein the gas-collecting body contains such materials, which in contact with the molten metal do not form liquid reaction 10 products, wherein the materials not forming liquid reaction products form at least a part of the surface of the gas-collecting body as a surface layer, which is provided for contact with the molten metal, and that the surface layer has a thickness of approximately 0.3 to 5 mm. Therefore, because the gas-collecting body contains such materials, which in is contact with the molten metal do not form liquid reaction products, the surface of the gas collecting body therefore cannot be occupied with foreign materials, such that the contact of the molten metal with the gas-collecting body is guaranteed, and thereby allowing a gas exchange. In particular, it is advantageous that the portion of materials, which in contact with the molten metal do not form liquid reaction products, equals at least 80 20 wt.%, preferably at least 90 wt%, relative to the gas-collecting body. In addition, it is useful that the gas-collecting body is a porous body, wherein the porosity preferably equals approximately 50%. Advantageously, the gas-collecting body contains magnesium oxide and/or aluminum oxide and/or chromium oxide. In particular, the gas-collecting body can 25 contain a material of the formula AB 2 0 4 , where A is a metal preferably from the group Mg, Fe, and Mn, and B is another metal preferably from the group Al, Cr, Fe, and V. The material of the formula AB 2 0 4 has a spinel structure. This can already exist in the unused gas-collecting body or can be formed from 3 material of the gas-collecting body for the first time when immersed or during the presence of the gas-collecting body in the molten iron or steel. For forming the AB 2 0 4 structure, the metals above-named can preferably be used. According to the invention, the materials not forming liquid reaction products form at least part of the surface of the gas-collecting body as a surface layer, namely at least a part of the surface of the gas-collecting body, which is provided for contact with the molten metal. The surface layer has a thickness of approximately 0.3 to 5 mm. The device can be used according to the invention in molten steel with an oxygen content of at least 100 ppm and/or a content of sulfur and/or magnesium and/or silicon of at least 0.1 wt.%. The device can also be used according to the invention for measuring hydrogen, nitrogen, carbon monoxide, and/or carbon dioxide in molten steel. An embodiment of the invention is explained hereafter with reference to a drawing. Shown in the drawing is Figure I the immersion end of a device according to the invention, in section. The basic construction of a device for measuring the gas content in molten metal is known, for example, from EP 307 430 B 1. Figure 1 of EP 307 430 B 1, in connection with the description, shows the measurement construction including the immersion end with a gas-collecting body. The present invention can also relate back to this basic construction. The measurement process is likewise described, for example in EP 307 430 B 1.
4 The immersion end I is connected to an attachment nozzle 2 with a carrier tube, with whose help the immersion process is performed. The attachment nozzle contains several gas connections 3; 3', wherein the centrally arranged gas connection nozzle 3' introduces carrier gas into the molten metal through a gas supply line 4. The gas supply line 4 is composed essentially of a quartz tube, which opens at its immersion end into a further, bent quartz tube 5, whose opening is oriented in the direction of the gas-collecting body 6. The gas-collecting body 6 has a bell-shaped recess 7 around the gas supply line 4. The opening of the quartz tube 5 is oriented towards the recess 7, so that the gas stream flows out of the supply line 4 towards the recess 7. Here, gas is collected from the molten metal and guided with the carrier gas by the body of the immersion end I towards the gas connections 3. From there, transmission continues to the corresponding measurement devices. Between the attachment nozzle 2 and the gas-collecting body 6 the immersion end I has a quartz tube 8, which is fixed on the attachment nozzle 2 and on the gas-collecting body 6 by means of bonding agent 9 or cement 10. The quartz tube 8 is filled with aluminum oxide I1, which, first, fixes the gas supply line 4 and, second, allows the transmission of the carrier gas with the gas to be measured. The gas-collecting body 6 is made of MgA120 4 and an organic binding agent. It has a porosity of approximately 50%, so that the gas from the molten steel can be collected. The average pore diameter equals approximately 40 pm. The composition of the gas-collecting body guarantees 5 that the pores are not blocked or covered in any way, but instead remain open, so that the gas can penetrate in an unimpaired way. In another example, the gas-collecting body 6 is formed from pressed and sintered A1 2 0 3 corundum, after which it is immersed and impregnated in an aqueous MgO suspension, whereby a surface layer is produced. The gas-collecting body 6 is then dried. The thickness of the surface layer equals approximately 0.3 to 5 mm, preferably I to 3 mm, after the treatment. The layer is not shown in the drawing.

Claims (9)

  1. 3. Device according to claim 1 or 2, wherein the gas-collecting body is a porous body. is 4. Device according to any one of claims 1 to 3, wherein the gas-collecting body contains magnesium oxide and/or aluminum oxide and/or chromium oxide.
  2. 5. Device according to any one of claims I to 3, wherein the materials in the gas-collecting body, which on contact with the molten metal do not form liquid reaction products, are of the formula AB 2 0 4 , where A is a metal optionally from the group Mg, Fe, 20 and Mn, and B is a further metal optionally from the group Al, Cr, Fe, and V.
  3. 6. Device according to any one of claims I to 3, wherein the gas-collecting body contains a material which, on contact with the molten metal does not form liquid reaction products and which converts to materials of the formula AB 2 0 4 upon immersion of the device into molten iron or steel, wherein A is a metal optionally from the group Mg, Fe, 25 and Mn, and B is a further metal optionally from the group Al, Cr, Fe, and V.
  4. 7. Use of a device according to any one of claims I to 6 for measurement in molten steel having an oxygen content of at least 100 ppm and/or a content of sulfur and/or magnesium and/or silicon of at least 0.1 wt.%.
  5. 8. Use of a device according to any one of claims I to 6 for measurement of 30 hydrogen, nitrogen, carbon monoxide, and/or carbon dioxide in molten steel.
  6. 9. Device for measuring the gas content in a molten metal which device is substantially as herein described with reference to Figure 1.
  7. 10. Use of a device according to claim 9 for measurement in molten steel having an oxygen content of at least 100 ppm and/or a content of sulfur and/or magnesium and/or 35 silicon of at least 0.1 wt.%. 7
  8. 11. Use of a device according to claim 9 for measurement of hydrogen, nitrogen, carbon dioxide, and/or carbon dioxide in molten steel.
  9. 12. A device for measuring the gas content in a molten metal substantially as herin described with reference to any one of the embodiments of the invention as 5 illustrated in the accompanying drawings and/or examples. Dated 24 December, 2009 Heraeus Electro-Nite International N.V. 10 Patent Attorneys for the Applicant/Nominated Person SPRUSON & FERGUSON
AU2006222318A 2005-03-09 2006-02-27 Device for measuring the gas content in a metal melt Expired AU2006222318B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005011181.5 2005-03-09
DE102005011181A DE102005011181A1 (en) 2005-03-09 2005-03-09 Apparatus for measuring the gas content in a molten metal
PCT/EP2006/001765 WO2006094668A1 (en) 2005-03-09 2006-02-27 Device for measuring the gas content in a metal melt

Publications (2)

Publication Number Publication Date
AU2006222318A1 AU2006222318A1 (en) 2006-09-14
AU2006222318B2 true AU2006222318B2 (en) 2010-02-18

Family

ID=36463393

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2006222318A Expired AU2006222318B2 (en) 2005-03-09 2006-02-27 Device for measuring the gas content in a metal melt

Country Status (12)

Country Link
US (1) US7685863B2 (en)
EP (1) EP1856502B1 (en)
JP (1) JP5014325B2 (en)
KR (1) KR101249084B1 (en)
CN (1) CN101137896B (en)
AU (1) AU2006222318B2 (en)
BR (1) BRPI0607819A2 (en)
CA (1) CA2600266C (en)
DE (1) DE102005011181A1 (en)
ES (1) ES2544654T3 (en)
PL (1) PL1856502T3 (en)
WO (1) WO2006094668A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007063673B4 (en) 2007-07-10 2018-02-08 Heraeus Electro-Nite International N.V. measurement methods
BRPI1103889B1 (en) * 2011-08-17 2020-09-24 Ecil Met Tec Ltda IMMERSION PROBE FOR GAS ANALYSIS IN CAST METAL
CN105628769A (en) * 2015-12-24 2016-06-01 冶金自动化研究设计院 Reciprocating-type regeneration-method continuous oxygen measurement sensor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2423783A1 (en) * 1974-05-16 1975-12-04 George R Fitterer Immersion probe for determn. of dissolved oxygen in melts - esp. of metals, using various electrolytes and oxygen-reference materials
EP0295798A1 (en) * 1987-05-28 1988-12-21 Alcan International Limited Probe for determination of gas concentration in molten metal
US6216526B1 (en) * 1998-12-16 2001-04-17 Midwest Instrument Co., Inc. Gas sampler for molten metal and method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3868192D1 (en) * 1987-03-18 1992-03-12 Electro Nite DEVICE AND METHOD FOR MEASURING THE GAS CONTENT OF A LIQUID METAL AND PROBE THEREFOR.
JPH01279704A (en) * 1988-05-02 1989-11-10 Nippon Steel Corp Porous refractory for molten metal analysis probe
JPH03261847A (en) * 1990-03-12 1991-11-21 Nippon Steel Corp Fine particle forming probe for directly analyzing molten metal
DE4305170C1 (en) * 1993-02-19 1994-07-28 Daimler Benz Ag Spinel containing magnesium and aluminum, as well as processes for its synthesis and use
DE19813655C2 (en) * 1998-03-27 2000-04-27 Degussa Storage material for sulfur oxides, process for its production and use

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2423783A1 (en) * 1974-05-16 1975-12-04 George R Fitterer Immersion probe for determn. of dissolved oxygen in melts - esp. of metals, using various electrolytes and oxygen-reference materials
EP0295798A1 (en) * 1987-05-28 1988-12-21 Alcan International Limited Probe for determination of gas concentration in molten metal
US6216526B1 (en) * 1998-12-16 2001-04-17 Midwest Instrument Co., Inc. Gas sampler for molten metal and method

Also Published As

Publication number Publication date
EP1856502A1 (en) 2007-11-21
CA2600266C (en) 2015-06-16
EP1856502B1 (en) 2015-06-03
WO2006094668A1 (en) 2006-09-14
CA2600266A1 (en) 2006-09-14
DE102005011181A1 (en) 2006-09-14
BRPI0607819A2 (en) 2009-10-06
JP5014325B2 (en) 2012-08-29
PL1856502T3 (en) 2015-11-30
CN101137896A (en) 2008-03-05
KR20070108400A (en) 2007-11-09
ES2544654T3 (en) 2015-09-02
US20080196476A1 (en) 2008-08-21
AU2006222318A1 (en) 2006-09-14
JP2008533453A (en) 2008-08-21
US7685863B2 (en) 2010-03-30
CN101137896B (en) 2011-07-06
KR101249084B1 (en) 2013-03-29

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MK14 Patent ceased section 143(a) (annual fees not paid) or expired